Fix bad detection of warnings + remove outdated scripts (#8704)

for examples/tests a warning might be reported as `t`

.gitattributes

@@ -44,19 +44,16 @@ Documentation/Doxyfile text eol=lf
 Documentation/pkglist_filter text eol=lf
 Installation/update_CHANGES text eol=lf
 Scripts/developer_scripts/autotest_cgal text eol=lf
-Scripts/developer_scripts/autotest_cgal_with_cmake text eol=lf
 Scripts/developer_scripts/cgal_build text eol=lf
 Scripts/developer_scripts/cgal_depend text eol=lf
 Scripts/developer_scripts/cgal_git_update_hooks_for_client text eol=lf
-Scripts/developer_scripts/cgal_test_with_cmake text eol=lf
 Scripts/developer_scripts/cgal2gml text eol=lf
 Scripts/developer_scripts/check_library_uses_no_gpl_files text eol=lf
 Scripts/developer_scripts/check_licenses text eol=lf
 Scripts/developer_scripts/check_macro_names text eol=lf
 Scripts/developer_scripts/check_no_CGAL_USE_without_includes_before text eol=lf
 Scripts/developer_scripts/check_svn_keywords text eol=lf
 Scripts/developer_scripts/create_cgal_test text eol=lf
-Scripts/developer_scripts/create_cgal_test_with_cmake text eol=lf
 Scripts/developer_scripts/create_internal_release text eol=lf
 Scripts/developer_scripts/create_macosx_installer text eol=lf
 Scripts/developer_scripts/create_new_release text eol=lf